2017-18 Outward supply

Shivalingappa Kanaka (16 Points)

05 September 2019  
One of my clients filed gstr-3B returns for the months during 2017-18 as NIL. But he executed works contract for Gov't departments and there is a turn over. The gst authorities have noticed the same and treating it as suppressed to. Whether it is a suppression or he has the chance to declare in Gstr-9? .Please guide me in this regard